﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.IO;

namespace JieTuDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //创建图象，保存将来截取的图象
            Bitmap image = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
            Graphics imgGraphics = Graphics.FromImage(image);
            //设置截屏区域
            imgGraphics.CopyFromScreen(0, 0, 0, 0, new Size(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height));
            //保存
            SaveImage(image);
        }
        //保存图象文件
        private void SaveImage(Image image)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            if (saveFileDialog.ShowDialog(this) == DialogResult.OK)
            {
                string fileName = saveFileDialog.FileName;
                string extension = Path.GetExtension(fileName);
                if (extension == ".jpg")
                {
                    image.Save(fileName, ImageFormat.Jpeg);
                }
                else
                {
                    image.Save(fileName, ImageFormat.Bmp);
                }
            }
    }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}
